Wednesday, 10 September 2014

Kinetoscope 

A kinetoscope is a device which allows people to view motion pictures. The kinetoscope was one of the first such devices widely developed and distributed, and while the design ultimately proved to be a failure, it clearly inspired other inventors, so it could be considered a landmark invention in the history of film. This device was invented in the laboratory of Thomas Edison, and as was conventional for inventions in his lab, the patent was taken out by Edison himself, making it challenging to determine precisely who worked on the project. The design for the kinetoscope consisted of a closed cabinet in which the film was spooled. To operate the device, the user opened the top and peered through a small hole, and as the film was moved across a series of rollers, a backlight would illuminate it, creating the illusion of a moving picture, as long as the film was rotated at the proper speed. When the kinetoscope was first shown to the public in 1894, it proved to be a big hit.
Kinetoscopes began to spring up all over the United States, commonly being found in kinetoscope parlours  which featured a row of the devices which users could operate by inserting coins into slots. In addition to short films, the kinetoscope was also used to display footage of things like sports matches, allowing people all over the United States to see events which they had not been able to attend. A version of the kinetoscope accompanied with sound was also developed, and christened the kinetophone. Linking sound with pictures turned out to be quite a challenge, as it was extremely difficult to synchronise the sound and the picture. For viewers, the kinetophone was also not terribly comfortable or convenient to use, as it required wearing headphones while leaning over the cabinet to view the movie as it was displayed.


Phenaksitoscope 

The phenakistoscope (also spelled phenakistiscope or phenakitiscope) was an early animation device that used a spinning disk of sequential images and the persistence of vision principle to create an illusion of motion. The phenakistoscope used a spinning disc attached vertically to a handle. Arrayed around the disc's center were a series of drawings showing phases of the animation, and cut through it were a series of equally spaced radial slits. The user would spin the disc and look through the moving slits at the disc's reflection in a mirror. The scanning of the slits across the reflected images kept them from simply blurring together, so that the user would see a rapid succession of images that appeared to be a single moving picture. A variant of it had two discs, one with slits and one with pictures; this was slightly more unwieldy but needed no mirror. Unlike the zoetrope and its successors, the phenakistoscope could only practically be used by one person at a time. It was invented by Joseph Plateau in 1832. After going to market, the phenakistoscope received other names, including Phantasmascope and Fantoscope (and phenakistiscope in Britain and many other countries).  It was quite successful for two years until William George Horner invented the zoetrope, which offered two improvements on the phenakistoscope.  First, the zoetrope did not require a viewing mirror.  The second and most influential improvement was that more than one person could view the moving pictures at the same time. Although the principle behind the phenakistoscope had been recognized by the Greek mathematician Euclid and later in experiments by Newton, it was not until 1829 that this idea became firmly established by Belgian Joseph Plateau. Plateau planned it in 1839 and invented it in 1841. Later the same year the Austrian Simon von Stampfer Invented the stroboscopic disk, a similar machine. A contemporary edition of Britannica says "The phenakistoscope or magic disc...was originally invented by Dr. Roget, and improved by M. Plateau, at Brussels, and Dr. Faraday."

The phenakistoscope used a spinning disc attached vertically to a handle. Arrayed around the disc's center were a series of drawings showing phases of the animation, and cut through it were a series of equally spaced radial slits. The user would spin the disc and look through the moving slits at the disc's reflection in a mirror. The scanning of the slits across the reflected images kept them from simply blurring together, so that the user would see a rapid succession of images that appeared to be a single moving picture.
A variant of it had two discs, one with slits and one with pictures; this was slightly more unwieldy but needed no mirror. Unlike the zoetrope and its successors, the phenakistoscope could only practically be used by one person at a time.

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